JPH05284080A - Radio telephony equipment - Google Patents

Abstract

PURPOSE:To make the radio telephony equipment compact by reducing the number of terminals at an external connector in the equipment provided with a test mode. CONSTITUTION:While a phone mode is set, a phone mode terminal 110c of a gate array 110 is turned to 'H' and while that mode is not set, the terminal is turned to 'L.' On the other hand, when a terminal 101a used for both of a test mode and a phone alert and a ground terminal 101b are short-circuited at an external connector 101, the test mode terminal 110a of the gate array 110 is turned to 'L.' Therefore, the test mode is started when the state of the phone mode terminal 110c is 'L' at that time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a radiotelephone device having a test mode, and in particular, an external terminal required to activate the test mode is shared with other functions to reduce the number of external terminals. Wireless telephone device.

[0002]

2. Description of the Related Art Generally, a wireless telephone device of this type includes
An operation mode called the test mode is provided to test various operations of the device.This test mode is activated by short-circuiting the test mode dedicated terminal provided on the external connector. ing.

An example of a circuit diagram of a radio telephone device having such a test mode (in this example, a car telephone device) is shown in FIGS. 5 and 6. In FIG. 5, a gate array (GA) 508 incorporates various functions necessary for controlling the apparatus. The gate array 508 has a test mode terminal 508a and a horn alert terminal 508b.
And a horn mode terminal 508c.

On the other hand, the external connector 501 is provided with a test mode terminal 501a, a horn alert terminal 501b and a ground terminal 501c. Gate array 5
08 test mode terminal 508a is connected to the external connector 50.
It is directly connected to the first test mode terminal 501a. In addition, the horn alert terminal 5 of the gate array 508
08b is connected as a control input to a drive circuit formed by connecting two transistors 504 and 505 in a Darling tone connection, and the output of this drive circuit is connected to the horn alert terminal 501b of the external connector 501. .. Further, the horn mode terminal 508c of the gate array 508 has a horn mode designation signal (HORN MON).
DE) is input. In the figure, Vc is a gate array (GA) type 5 volt DC power source, 506 and 50.
Reference numeral 7 is a current limiting resistor, 502 is a capacitor, and 503 is a diode for protection when a surge voltage is applied or when positive and negative connections are made.

In the above arrangement, the gate array 508 changes the "H" level of the horn mode designating signal (HORN MODE) by a command from a microcomputer (not shown).
When it is supplied to the horn mode terminal 508c, the gate array 508 is set to the horn mode in response to this.

When an incoming call is confirmed in this horn mode, a horn alert terminal 508 of the gate array 508.
"b" outputs "H" as a horn alert activation signal, and the activation signal "H" turns on the two transistors 505 and 506 forming the drive circuit, whereby the horn alert terminal 501 of the external connector 501.
The vehicle horn connected to b is driven and a so-called horn alert function is realized.

On the other hand, in the external connector 501, when the test mode terminal 501a and the ground terminal 501c are short-circuited, the test mode terminal 50 of the gate array 508.
By inputting "L" to 8a, the gate array 5
08 will operate and the above-mentioned test mode will be started.

In the example of FIG. 5 described above, in consideration of the case where the electric load of the automobile horn for horn alert is large, two transistors 505, 5 are provided as a drive circuit.
A 06 darling tone connection was used, but if the electrical load is not too heavy, this should be 1 as shown in FIG.
Of course, the individual transistors 604 can be substituted.

However, in such a conventional radiotelephone device (in this case, a car telephone device), as shown in FIGS. 5 and 6, a terminal dedicated to the test mode which is not normally used. 501a is an external connector 501
Since it is always present in the external connector 501, the space utilization efficiency of the external connector 501 is inferior, which is an obstacle to downsizing, and an extra number of terminals is required, which leads to an increase in cost.

[0010]

As described above, in the conventional radio telephone apparatus, as shown in FIGS. 5 and 6, the terminal 50 dedicated to the test mode, which is not normally used, is provided.
Since 1a always exists in the external connector 501, there is a problem that the space utilization efficiency of the external connector 501 is poor, which is an obstacle to downsizing, and an extra number of terminals is required, which leads to an increase in cost. ..

The present invention eliminates the above-mentioned problems and provides a radiotelephone device with a test mode of this kind, which can reduce the number of terminals in an external connector and can be made compact. With the goal.

[0012]

According to the invention of claim 1 of this application, in a radiotelephone device adapted to shift to a test mode by short-circuiting a test mode terminal existing on the external connector, the external connector is provided. The existing test mode terminal is shared by functions other than the test mode, and means for deciding whether to activate the test mode or another function when the test mode terminal is short-circuited. It is characterized by including.

The invention of claim 2 of this application is characterized in that, in the invention of claim 1, the function other than the test mode is a horn alert function of a car telephone.

[0014]

According to the invention of claim 1, since it is not necessary to provide a dedicated terminal for the test mode, the number of terminals in the external connector can be reduced and the external connector can be made compact.

According to the second aspect of the invention, since the terminal for the test mode is also used as the terminal for the horn alert of the automobile, it can be directly applied to the existing device as it is, and the horn alert is not so much. Since it is not a frequently used function, it does not hinder the activation of the test mode.

[0016]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. FIG. 1 shows an example of an automobile telephone device which is an embodiment of a wireless telephone device according to the present invention. In FIG. 1, a gate array (GA) 110 incorporates various functions necessary for controlling the apparatus. The gate array 110 has a test mode terminal 110a, a horn alert terminal 110b, and a horn mode terminal 110c. Is provided.

On the other hand, the external connector 101 is provided with a test mode / horn alert dual-use terminal 101a and a ground terminal 501b. The horn alert terminal 110b of the gate array 110 has two transistors 10
3, 104 are connected as a control input to a drive circuit formed by darling tone connection, and the output of this drive circuit is connected to the test mode / horn alert dual-use terminal 101a of the external connector 101. Further, the pull-up resistor 107 and the reverse current blocking diode 1 are provided between the collector of the final-stage transistor 103 that constitutes the drive circuit and the gate array power supply Vc (5 volts).
06 are connected in series.

The test mode terminal 110a of the gate array 110 is supplied with the potential of the connection point between the pull-up resistor 107 and the backflow prevention diode 106, and the horn mode designating signal (HORN MODE) is supplied to the horn mode terminal 110c. ) Is entered.

In the figure, Vc is a gate array (GA) type 5 volt DC power source, 105, 108, 1
09 is a current limiting resistor, 116 is a capacitor, 102 is a diode for protection when a surge voltage is applied or positive / negative reverse connection is made, and 106 is a horn alert system power supply (13.
This is a diode for preventing a reverse current from flowing into the test mode terminal 110a of the gate array 110 due to the potential difference between the gate array system power supply (7 V) and the gate array power supply (5 V).

Next, the case where the horn mode is first activated in the above configuration will be described in detail with reference to FIG. On the keyboard of the control unit (not shown), a predetermined key input operation (for example, [FNC], [#], [*],
[*]), The horn mode is set (steps 301 and 302), and the horn mode designation signal (H) is applied to the horn mode terminal 110c of the gate array 110.
"H" of ORN MODE) is supplied (step 30)
3, 304, 305), and in response to this, the gate array 11
0 is set to the horn mode.

When an incoming call is confirmed in this horn mode, the horn alert terminal 110 of the gate array 110.
“H” is output as a horn alert activation signal from b, and the two transistors 103 and 104 forming the drive circuit are turned on by the activation signal “H”, so that the test mode horn alert of the external connector 101 is generated. An automobile horn (not shown) connected to the dual-purpose terminal 101a is driven, and a so-called horn alert function (incoming call alert function by the automobile horn) is realized.

Next, FIG. 4 shows the case where the test mode is activated.
Will be described in detail with reference to. In the external connector 101, the test mode / horn alert dual-use terminal 101
When a and the ground terminal 101b are short-circuited, a current path passing through the pull-up resistor 107 → diode 106 → test mode / horn alert dual-use terminal 101a → ground terminal 101b is formed to the test mode terminal 110a of the gate array 110. "L" is input (steps 401 and 402).

In this manner, when "L" is supplied to the test mode terminal 110a of the gate array 110, the horn mode terminal 110c of the gate array 110 is subsequently set to "H" (setting the horn mode) or "L". It is determined whether or not "(not set to horn mode) (step 403),
Only when the horn mode terminal 110c is "L" (while the horn mode is not set), the test mode is set (YES in step 403) and the test mode is activated (steps 404, 405).

Therefore, since the transistor 103 is turned on while the horn mode is set, the test mode terminal 11
If 0a becomes "L", the horn mode terminal 110c is "H", and thus the process of step 404 is skipped and the test mode is not activated by mistake.

In the example of FIG. 1 described above, in consideration of the case where the electric load of the automobile horn for horn alert is large, two transistors 103, 1 are provided as a drive circuit.
04 darling tone connection was used, but if the electrical load was not very high, this should be 1 as shown in FIG.
Of course, the individual transistors 203 can be substituted.

As is clear from the above description, in this car telephone device, the horn alert terminal conventionally provided also has a function as a test mode terminal, so that the external connector 101 has a test mode. It is not necessary to provide a dedicated terminal, and the external connector can be made compact accordingly and the cost can be reduced. Although the test mode terminal and the horn alert terminal are shared in the above embodiments, other terminals to be shared with the test mode terminal are not limited to this.

[0027]

As described above, according to the present invention,
In a wireless telephone device with a test mode of this kind, it is possible to reduce the number of terminals in the external connector, to make the device compact and to reduce the cost.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a car telephone system showing an embodiment of the present invention.

FIG. 2 is a circuit diagram of a car telephone system showing another embodiment of the present invention.

FIG. 3 is a flowchart showing horn mode setting processing according to the present invention.

FIG. 4 is a flowchart showing a test mode setting process according to the present invention.

FIG. 5 is a circuit diagram of a conventional car telephone device.

FIG. 6 is a circuit diagram of another type of conventional mobile telephone device.

[Explanation of symbols]

 101 External Connector 101a Terminal for Test Mode / Horn Alert 101b Ground Terminal 103, 104 Transistor 110 Gate Array (GA) 110a Test Mode Terminal 110b Horn Alert Terminal 110c Horn Mode

Claims (2)

[Claims] 1. A radiotelephone device adapted to shift to a test mode by short-circuiting a test mode terminal existing in an external connector, wherein the test mode terminal existing in the external connector has a function other than a test mode. And a means for deciding whether to activate the test mode or another function when the test mode terminal is short-circuited. 2. The radiotelephone device according to claim 1, wherein the function other than the test mode is a horn alert function of a car telephone.